In this article, we present a detailed study of the high-velocity molecular jet from the young Class 0 intermediate-mass protostellar system CepE-mm [1]}, [2]}, [3]}. Previous studies showed evidence for time-variability in the molecular outflow/jet emission, associated both with precession [4]} and internal bullets [5]}, [2]}, [7]}. Using the IRAM interferometer, we have imaged the rotational transitions CO \(J\) = 2–1 230538.00 MHz, a typical tracer of molecular outflows, along the full high-velocity jet at 1 resolution, and SO \(N_J\) = \(5_4\) –\(4_3\)  206176.013 MHz, a probe of molecular jets, at \(0.4\)  resolution towards the central protostellar core, as part of the SOLIS Large Program [8]}. We have carried out an observational study of the dynamics of the molecular outflow/jet system and the bullets. We show how the main jet kinematical features can be accounted for by a simple analytic model of the mass-ejection process. In a forthcoming paper (Schutzer in prep), we will present a detailed study of the unusually rich jet chemical composition and we will show how it originates from the jet structure and its dynamics.
